QFont font("Arial"); font.setPointSize(12);
QFont font("Times New Roman"); font.setPointSize(20);
QFont font("Verdana"); font.setPointSize(16);This code creates a QFont object with the Verdana font, and sets the font size to 16 points. In all of these examples, the QFont setPointSize method is used to set the size of the font. These examples are brief and describe the creation of a QFont object and setting font size. These examples are likely part of the Qt core library as they use the QFont class.